Effluent filter



FIG. 1 is a rear perspective view of the effluent filter;

FIG. 2 is a rear plan view of the effluent filter;

FIG. 3 is a right side view of the effluent filter;

FIG. 4 is a front plan view of the effluent filter;

FIG. 5 is a left side view of the effluent filter;

FIG. 6 is a top view of the effluent filter; and,

FIG. 7 is a bottom view of the effluent filter.

The handle shown in phantom lines is for illustrative purposes only, and forms no part of the claimed invention. 

The ornamental design for an effluent filter, as shown and described. 